Halket .— The Effect of Salt on the Growth of Salicornia. 153 
Diagram 4. This diagram gives three curves, A representing the average 
height which the main axes of the plants attained in the different solutions, B 
representing the average length of all the branches produced by the plants, 
and C the average total growth in length per plant (main axis and branches) 
under the various conditions of salinity. 
The photograph from which PL VIII was made was taken at an earlier 
date, June 10, and shows the plants as they were then. The black paper 
surrounding the jars had been temporarily removed to show the develop¬ 
ment of the roots. It will be noticed that the root development is abnormally 
great, and that it also is affected by the amount of sodium chloride present 
in the solution. 
After the photograph was taken the amount of sodium chloride present 
in each solution was estimated, and it was found that the amount of the 
salt present in each solution was approximately the same as at the com¬ 
mencement of the experiment, though the 2 % solution had become slightly 
more concentrated. The jars were at this time refilled with fresh solutions. 
It is perhaps worthy of record that the few measurements that were 
made of the diameter of the internodes show that this was less in those 
plants grown without salt than in those grown with it. In those plants of 
vS. ramosissima grown without salt the average diameter of the lowest inter¬ 
node of the plants on June 20 was 27 mm., while it was 3.5 mm. in those 
plants grown with 2 % and with 3 % of sodium chloride. These results are 
in accord with those of former experiments, showing that the presence of 
salt increases the succulence of plants. 
It is also worthy of record that plants of 5 . oliveri grown without 
sodium chloride did not flower, while those with sodium chloride did. Two 
plants in the 3 % solution, three in the 4 % solution, and one in the 5 % 
solution flowered. This is probably the reason that the curve of total 
growth of 5 . oliveri in Diagram 4 shows greater growth in the 1 % solution 
than in the 3 %, as fewer vegetative branches were produced when flowers 
were formed. 
The following conclusions may, I think, be deduced from these 
experiments: 
1. Salicornia oliveri , Moss., and Salicornia ramosissima grow better 
in the presence of sodium chloride than they do in its absence, the greatest 
growth being when 2 % to 3 % of this salt is present. Higher percentages 
decrease the growth of the plants. 
2. The effect of sodium chloride on the growth of Suaeda maritima is 
not so marked. Plants grow equally well in its absence as when a small 
quantity (1 /) is present. Growth decreased when a greater amount of salt 
is present, and decreases with the increase in amount. 
3. Salicornia ramosissima and Suaeda maritima can resist the presence 
of a large amount of sodium chloride, as is seen from the £ pan ’ experiments 
